Across
- 4. the middle layers of earth
- 7. formed by heat and pressure
- 9. cracks in earth's crust
- 10. the inside layers of earth
- 13. formed by layers of sediment
Down
- 1. melted rock inside earth
- 2. formed by cooled magma or lava
- 3. the theory that explains the motions of plates
- 5. a solid object that forms crystals
- 6. the breaking down of rocks into smaller pieces
- 8. the outer layer of earth
- 11. a sudden shaking of earth's crust
- 12. narrow valleys with sleep sides